Patent GB-344931-A (GB)
Title: Improvements in or relating to machines for trimming heel coverings
IPC: A43D27/00
Filed: 1929-12-14
Abstract: 344,931. Boots &c. UNITED SHOE MACHINERY CORPORATION, 205, Lincoln Street, Boston, U.S.A.-(Assignees of Knowlton, N. H.; Rockport, Massachusetts, U.S.A.) Dec. 14, 1929, No. 38344. Convention date, Dec. 17, 1928. [Class 17 (i).] Trimming.-A machine for trimming a heel covering while on a heel comprises a trimming knife, a shear member co-operating therewith, and interchangeable gauge members adapting the machine to prepare the margin of the covering for introduction into a recess in the heel breast, or for turning down over the edge of the attaching face. A breast flap may be trimmed on the bevel to be secured over covered ribs formed by tucking side margins of a trimmed cover into narrow recesses adjacent the corners of the heel breast, or be trimmed to fit a wide recess in the breast between such ribs. Duplicate but reversed mechanism is, preferably, provided, so that both margins of a covering may be trimmed without reversing the work. Gauges may be provided entering the narrow recess and engaging the projecting margin of the cover. The first gauge may be pivoted and spring-pressed to a position in advance of the knife to facilitate the starting of the cut. An eccentric pin 50, Fig. 2, on a driven shaft oscillates an arm 72 secured to a rocking shaft 60, to the other end of which is secured an arm 64 to the end of which is clamped an oscillating cutter 46. When it is desired to trim the side margins of a heel breast flap, a gauge 82, Figs. 3 and 4, having curved end to engage the rib formed by a narrow recess near the edge of the breast, is used, this gauge being carried by a member 110, Fig. 2, also carrying a shearing member 84, the member being vertically adjustable in a bracket 78 pivoted at 76, urged clockwise about this pivot by a spring 92, a stop screw 98 allowing the spring to function, when desired. This pivoting of the bracket 78 allows of the work being positioned with respect to the gauges, while these are removed from the knife, the bracket being swung by pressure of the work into operative position when the work has been properly positioned. An additional work guide 134 engages the outer surface of the margin of the breast flap The gauge 82 is apertured to receive the point of the knife. For trimming the margins of a cover extending around the sides and back of a heel, the bracket 78 may be removed and substituted by a bracket 138, Fig. 5, locked in position by a plate 144 and carrying a modified gauge and shearing member The shearing member has a lip portion with a bevelled edge, and its carrier is recessed to guide a vertically-adjustable member 162 carrying the gauge. A thin curved member 180, adapted to engage the recess 20 in the heel is hinged to the support 162 and urged outwardly of the machine by a spring 190 against a stop 192, Fig. 8. The gauge is, thus, allowed to engage the work in advance of the knife to facilitate proper commencement of the cut. An inside margin guide 200, Fig. 7, straightens the margin extending beyond the breast corners. When it is desired to trim the margin of the cover extending beyond the attaching face, the gauge 214, Fig. 9, is used. This gauge has a bent or hook portion with a roller 216 mounted at its end. Preferably, the trimming and gauging mechanism is in duplicate but reversed, each adapted to trim one of the two margins, so that the work need not be reversed. Specifications 251,272, [Class 17 (ii), Boots and shoes, Construction of], and 296,401, [Class 17 (i), Boots and shoes, Apparatus for making &c.], are referred to.